Operational Modes > Firewall Mode:

Administrator Console Settings
The firewall mode is a modification of the router mode. With the Web Filter set up in this mode, the unit will filter all requests. If the request is appropriate, the original packet will pass unchanged. If the request is inappropriate, the original packet will be blocked from being routed through.

Using the firewall mode, while the outgoing request is delayed slightly—to allow filtering to take place before the packet leaves the gateway router of the network—return traffic remains unaffected.

Hardware Settings
The firewall mode setup cannot be used with any other mode setup (invisible or router).

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